Merge tag 'stable/for-linus-3.5-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel...

[karo-tx-linux.git] / arch / x86 / xen / enlighten.c

diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index d1f9a0472d44cb088a9aab1011e6cf08010aa4b9..75f33b2a59336a865d7f8abf1dada19763696b70 100644 (file)
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -64,6 +64,7 @@
 #include <asm/stackprotector.h>
 #include <asm/hypervisor.h>
 #include <asm/mwait.h>
+#include <asm/pci_x86.h>
 
 #ifdef CONFIG_ACPI
 #include <linux/acpi.h>
@@ -263,7 +264,8 @@ static void xen_cpuid(unsigned int *ax, unsigned int *bx,
 
 static bool __init xen_check_mwait(void)
 {
-#ifdef CONFIG_ACPI
+#if defined(CONFIG_ACPI) && !defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR) && \
+       !defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR_MODULE)
        struct xen_platform_op op = {
                .cmd                    = XENPF_set_processor_pminfo,
                .u.set_pminfo.id        = -1,
@@ -351,7 +353,6 @@ static void __init xen_init_cpuid_mask(void)
        /* Xen will set CR4.OSXSAVE if supported and not disabled by force */
        if ((cx & xsave_mask) != xsave_mask)
                cpuid_leaf1_ecx_mask &= ~xsave_mask; /* disable XSAVE & OSXSAVE */
-
        if (xen_check_mwait())
                cpuid_leaf1_ecx_set_mask = (1 << (X86_FEATURE_MWAIT % 32));
 }
@@ -811,9 +812,40 @@ static void xen_io_delay(void)
 }
 
 #ifdef CONFIG_X86_LOCAL_APIC
+static unsigned long xen_set_apic_id(unsigned int x)
+{
+       WARN_ON(1);
+       return x;
+}
+static unsigned int xen_get_apic_id(unsigned long x)
+{
+       return ((x)>>24) & 0xFFu;
+}
 static u32 xen_apic_read(u32 reg)
 {
-       return 0;
+       struct xen_platform_op op = {
+               .cmd = XENPF_get_cpuinfo,
+               .interface_version = XENPF_INTERFACE_VERSION,
+               .u.pcpu_info.xen_cpuid = 0,
+       };
+       int ret = 0;
+
+       /* Shouldn't need this as APIC is turned off for PV, and we only
+        * get called on the bootup processor. But just in case. */
+       if (!xen_initial_domain() || smp_processor_id())
+               return 0;
+
+       if (reg == APIC_LVR)
+               return 0x10;
+
+       if (reg != APIC_ID)
+               return 0;
+
+       ret = HYPERVISOR_dom0_op(&op);
+       if (ret)
+               return 0;
+
+       return op.u.pcpu_info.apic_id << 24;
 }
 
 static void xen_apic_write(u32 reg, u32 val)
@@ -851,6 +883,8 @@ static void set_xen_basic_apic_ops(void)
        apic->icr_write = xen_apic_icr_write;
        apic->wait_icr_idle = xen_apic_wait_icr_idle;
        apic->safe_wait_icr_idle = xen_safe_apic_wait_icr_idle;
+       apic->set_apic_id = xen_set_apic_id;
+       apic->get_apic_id = xen_get_apic_id;
 
 #ifdef CONFIG_SMP
        apic->send_IPI_allbutself = xen_send_IPI_allbutself;
@@ -1371,13 +1405,17 @@ asmlinkage void __init xen_start_kernel(void)
                xen_start_info->console.domU.mfn = 0;
                xen_start_info->console.domU.evtchn = 0;
 
+               xen_init_apic();
+
                /* Make sure ACS will be enabled */
                pci_request_acs();
 
                xen_acpi_sleep_register();
        }
-               
-
+#ifdef CONFIG_PCI
+       /* PCI BIOS service won't work from a PV guest. */
+       pci_probe &= ~PCI_PROBE_BIOS;
+#endif
        xen_raw_console_write("about to get started...\n");
 
        xen_setup_runstate_info(0);